JPS60139993A - Lead-out system of resin for repair and pig in case of repair execution of existing pipe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention is directed to the derivation of repair resin and resin conveying resin introduced into the pipe of the existing pipe for repair during the repair work of an existing underground pipe, and the resin and resin conveying resin introduced into the pipe for repair. It is related to the method. [Technical problem of the invention]

Recently, existing underground gas pipes, especially cast iron pipes, have been better connected to water-type pipe fittings to connect them underground (under roads).
In the case of existing pipes with pipe 1, the joints of the pipe joints may be affected by the load of vehicles passing through the pipes, earthquakes, or changes in the joint state due to The joints of existing pipes should be left buried for the purpose of repairing leaks or preventive maintenance, as gaps may occur or the sealing material (sealing material) at the joints may deteriorate, causing leaks. One type of repair method is to repair the inner surface of the pipe by inserting a pipe into the pipe of an existing underground pipe, which slides in airtight contact with the inner surface of the pipe. The resin is introduced with resin placed on the front side, and the resin is cured and moved into the pipe by pulling the pig (in the process, the resin is sequentially filled into the gaps of multiple pipe joints in the existing pipe). A method for repairing pipe joints has been proposed, and during this repair work, once the repair of a predetermined section is completed, the resin residue introduced into the pipe and the resin transporting pig can be efficiently guided out from the pipe end. J: Sea urchin ni T-It is necessary to make a big deal.

[Objective of the Invention] Based on the above problem, the present invention is based on the above problem, and the present invention is based on the above problem, and it is possible to take out the vig and discharge the residual resin in an intensive and efficient manner by winding up the tow rope once the repair of a predetermined section is completed. Not only can construction work be made more efficient, but the outlet section also provides one stage of pressurized air supply into the existing pipes, which is required when carrying out the above-mentioned pipe joint repair method. The purpose of this invention is to provide a derivation method that allows for improved performance. [Structure of the Invention] For this purpose, the present invention divides an existing pipe to be repaired into repair units of a predetermined length,
111t for one exit side of the existing pipe
The T-opening part is exposed in a shaft opening above the ground, and a VIG lead-out pipe bent toward the ground is removably connected to the separation opening in the shaft, and a residual resin discharge port is provided in the lead-out pipe. and the pressure air supply port are removably attached to the end of the lead-out pipe, and the lid body with the tow cable outlet is attached to the outlet of the lead-out pipe to maintain the above pressure during repair work. F from the air supply port! The structure is such that the air pressure required for resin filling is applied to the inside of the L-tier pipe, and when the repair is completed, the lid can be removed to discharge the residual resin and take out the big by winding the tow cable. It is characterized by what it does. [Embodiment] Hereinafter, an embodiment of the present invention will be specifically described with reference to the drawings. FIG. 1 is a diagram schematically showing the entire apparatus for repair work, and reference numeral 1 in the figure indicates an existing pipe to be repaired that is installed underground. This is a conventional piping method in which VI iron pipes of a predetermined size are sequentially connected through water-collapse type pipe joints 13 and are piped underground for a long time. Note that, as shown in an enlarged view in FIG. 7, the pipe joint portion 13 of the existing pipe 1 is, for example, a large diameter portion 1 provided at the pipe end of one pipe.
3a, the other tube end 13b Ifi abuts, and the abutment fitting is provided with a seal i14, usually referred to as [Decommissioned, 1].
The existing pipe 1 is filled with water and the opening is sealed with lead material 15 to form a □, and the existing pipe 1 is installed underground (under the road).
In □, due to the above-mentioned reasons, the joint state of the pipe joint 13 changes and a gap is created, or the sealing material 1
4 deteriorates and becomes the cause of leakage, and it becomes necessary to repair it, and this is where the present invention takes place.''-! Pipe joint flat part 1
Infiltrate the resin into the gap 3 and the seal □ material 14. J: This is an attempt to repair sea urchins by filling the sea urchin.゛In the present invention, when repairing the blood □ installed pipe 10'@joint part 13 described in -1-, the existing pipe ``1'' is first repaired with a length of □, for example, 100 m, that is suitable for repair. Divide into repair section 1, and expose one separated end 11 of A to the 5-pit opened above the ground, and expose the other separated end 12 to the 5-pit opened to the ground, respectively. One of the separations [11 is between the separations 1 and 11 as the inlet side.
A curved pig insertion conduit 5 whose tip is bent toward the ground is detachably connected to one part by a clamp. In addition, as shown in an enlarged view in FIG. 2, this big insertion conduit 5 has a fat filling opening 5a and an air exhaust opening 5b located at a high level. These 11 parts 5a and 5b each have an opening/closing cock 52.
53 was established

[It's being pulled. The mouth portion 5a of the resin filling tank 141 is communicated with the resin filling tank 7 via the hose 7a, and the resin filling tank 7 is connected to the resin filling tank 7 through the hose 7a.
The filling pressure is applied from the small compressor 70 by driving the generator 7b. Further, in the present invention, the outlet pipe 6 of the pig is connected to the opening of the other /j 11Ilifa 12 with this as the outlet side. The lead-out pipe 6 of this pig is bent so that the end of the pipe faces the ground, and the lead-out pipe 6 has a 6-shaped pipe 6 facing diagonally upward, as shown in an enlarged view in FIG. A resin discharging part 6a for discharging residual resin is provided at one part, and an opening/closing lock 61 is provided there. In addition, at the upper position of the resin discharge port 61J,
The outlet pipe 6 has an air supply port pipe 6b for supplying pressurized air into the existing pipe 1 on the forward white chrysanthemum side of the bigs 2 and 3. , pressure operation] The outlet pipe 6 is connected to the compressor 10 through the unit 10a.The outlet pipe 6 is equipped with a lid 8 equipped with a guide reel 81 for guiding the tow rope 4 pulled out from inside the existing pipe 1. ,
The outlet pipe 6 is opened and detachably attached by a clamp 82. As shown in FIG. 6, the lid 8 consists of a half lid 8a with a guide reel 81 supported by Braun 1-83, and the remaining half 1.
18b, which is composed of a combination U, and a pullout port 84 for the tow rope 4.
is provided at a point U between the two half-lids 8a and 8b. Note that the lid 8 is provided with grooves 8C on the outer periphery.
The cam 87 is inserted into the coupler 85 provided at the open end of the lead-out tube 6, and by operating the clamp lever 86, the cam 87 installed in the cuff 85 is fitted into the groove 8C. However, when performing repair work, the tow cable 4 is passed through the existing pipe 1 from one of the VIG insertion pipes 5 and pulled out from the other VIG outlet pipe 6. By winding the tip of the tow rope 4 with the drum 9a of the winch 9, the pair of rear vigs 2 and 3 attached to the tow rope 4 are coated with low viscosity melon resin C in front of the front vig 2 of the king. In front of the rear big 3, resin glue for sealing the joint parts is placed in each case and introduced into the existing pipe 1, and the pipe is pulled from the entrance side to the exit side. The front pig 2 has a structure in which sealing fins are protruded from the periphery of a cylindrical body, as shown in an enlarged view in FIG. The center of the cylinder has a hole through which the tow rope 4 is inserted, allowing air to flow back and forth, and by clamping the collars 28 and 29 to the tow rope 4, the front pig 2 can pass through the tow rope 4. The rear big 3 is fixed to the resin IC as shown in FIG.
Because it is necessary to provide a switching function, resin introduction grooves 11 that open toward the front in the traveling direction are formed on the left and right outer peripheral walls of the BIG, and parallel to this. In the body of the vig 3, replacement grooves 18 are formed at the upper and lower outer circumferential walls of the vig. And these grooves 17
．． 18, each rear end wall in the traveling direction is formed into a tapered end wall 17a, 18a that slopes obliquely toward the rear, and the replacement groove 18 is buried in the big (for example) A passage 19 made of polyethylene tycope or the like is opened to the rear of the rear vig 3. Therefore, the winch 9 winds up the tow rope 4 to pull the vig 2 and 3, and the vig 2 and 3 tow the resin. When C and D move inside the existing pipe 1, the resin C in the previous stage removes the dust inside the existing pipe 1 and the dust in the space of the pipe lf= section 13 by adhering it with the adhesiveness of the resin itself. In addition, when the rear side big 3 reaches the position of the pipe joint part 13 (see Fig. 7), the resin on the front side of the rear side big 3 is removed from the inner wall of the existing pipe 1 during the towing movement. Resin pressure is generated in the resin itself due to viscous resistance between is acting on the resin through the center hole of the front pig 2, and due to these filling pressures, the resin flows into the joining space of the pipe joint part 13 via the groove 17 on the outer periphery of the pig. On the other hand, from the joint space of the pipe joint part 13,
The air staying there is naturally pushed out backwards through the other groove 18 by receiving the above-mentioned filling pressure.In this way, the resin is released from the sealing material from the abutment gap of the pipe joint 13. There is a part C that penetrates and fills into the pipe joint part 13 and achieves the sealing effect of the pipe joint part 13. [Operation of the invention] The existing pipe 1 in the repair section is moved by the movement of the resins C and D by the pulling of the above-mentioned Vig 2.3. When the repair of the large number of pipe joints 13 interposed in the pipe joints 13 is completed, and the front pig 2 reaches the inside of the VIG outlet pipe 6 from the terminal end of the membrane pipe 1, the winding of the winch 9 is temporarily stopped. Remove the clamp 82 and remove H8, and at the same time, open the bottom 1 and remove the residual resin C in front of the front pig 2 from the 4i111H discharge hole. Next, remove the fixing bolt of the front pig 2. 28a and 28b are loosened to release the tightening of the collar 28, the front side vig 2 and the tow line 4 are uncoupled, the front side vig 2 is made free from the tow line 4, and the winch 9 is used to tighten the tow line 4. When pulled, the front side pig 2 does not move and only the rear side pig 3 climbs up inside the outlet pipe 6. At this time, the resin residue remaining in front of the rear side pig 3 is discharged. The mouth parts f and ahst are discharged and collected into the container 41, and the front side pig 2 is pushed by the movement of the rear side pig 3, and the front and rear pigs 2 and 3 are connected to the outlet pipe 6.
For the tube end [taken out from 1 part. In this case, since the lid 8 is divided into two parts as shown, even if the tow line 4 is wound around the winch 9, it will not interfere with the removal of the front and rear pigs 2.3. [Effects of the Invention] Thus, according to the present invention, once the repair of the existing pipe in the repair section is completed, the removal and recovery of the residual resin and the removal of the pig can be efficiently carried out in a centralized manner by winding the winch. Because of this, the finishing work upon completion of the repair becomes simple and easy, and the next repair section can be repaired immediately, making it possible to significantly improve the efficiency of the repair work. In addition, the BIG lead-out pipe described in "2" is removably provided with a lid having an outlet for the tow cable at the pipe end [1].
be able to be opened and closed, and
Since the outlet pipe is equipped with a supply port for pressurized air and can supply pressurized air into the existing pipe,
It has the function of supplying the pressurized air required for the repair of R installation membrane pipe joints, and has the effect of simplifying the configuration of the device itself and improving work efficiency for bundling and repair. Also! can get. In carrying out the present invention, in the illustrated embodiment, it is necessary to temporarily stop the operation of the wing when the front big 2 is drawn into the outlet pipe 6, so that the winch operator can recognize this. Then, it is preferable to attach a marker piece, such as a piece of iron, to an appropriate position of the tow rope 4 in front of the front big 2J, so that it can be confirmed from the outside that the front big 2 has reached the outlet pipe 6. In addition, when the pigs 2 and 3 are introduced into the lead-out pipe 6, the lead-out pipe 6 is equipped with a means to detect this with a sensor, turn on the switch, and issue an alarm. It may be possible to notify that the rear pig 3 has entered the outlet pipe i.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of the entire repair work equipment showing an embodiment of the present invention, Fig. 2 is a road side view showing a section of a pipe for inserting a pig, and Fig. 2 is a section of a pipe leading out of a pig. Figure 4 is a schematic side view showing the pig in its towed state, Figure 5 is a perspective view of the rear pig, Figure 6 is a lid that closes the outlet of the pipe end of the Vig outlet pipe. Fig. 7 is an enlarged cross-sectional view of the main parts showing the state of resin filling. Large diameter part, 13b...tube end, 1
4...Sealing material, 15...Lead material, 17.18...
Grooves, 17a, 18a... Rava end wall, 19.
...Passway, 2...Front side big, 28.29...Collar, 13-3...Rear side pig, 4...Tow rope, 40...Branch 41...Container, 5...
...Vig insertion conduit, 5i...Resin filling port, 5b...
・Air discharge mouth part, 51...Clamp, 52.53・
... Cock, 54... Cross bin, 6... Pig outlet pipe, 6a... □ Discharge opening, 6b.
... Air supply [1 pipe, 61... Opening/closing cock, 7... Resin filling tank, 7a... Hose, 1b...
- Generator, IC...Compressor, 8...Lid, 81...Guide rail, 82...Clamp, 9...Winch, 9a...Drum, 10...
・Compressor, 10a...pressure operation 1 nit, A,
'B... Pit, C1D... Resin. 14-

Claims (1)

[Claims] A VIG that slides in airtight contact with the inner surface of the pipe is introduced into an existing underground pipe with resin placed on the front side of the VIG, and the resin is pulled by the VIG. In the process of moving along the inside of the pipe, resin is filled into the gaps between multiple pipe joints in the existing pipe. During the repair work, the existing pipe to be repaired is Divide into repair units of length, open one exit side separation opening of the separated existing pipe in A to the ground, and insert an exposed spoon into the above-mentioned separation opening in the shaft. A VIG lead-out pipe bent toward the direction is detachably connected, and the lead-out pipe is provided with a residual resin discharge port and an air supply port, and a lid body having a tow cable outlet. 11. Existing pipe repair method 2, characterized by being removably fitted to the pipe end outlet of the lead-out pipe [
Derivation method of repair resin and VIG at the time.